Quite possibly the most impractical accessory, the LMT 37mm M203 flare launcher has to be one of the coolest. I can't think of any practical reason to justify purchasing one, especially at $1600. But the first thought to pop into my mind when I saw this, is that it would look awesome on my "US Property" M4 SOCOM. They claim that except for the barrel having a smooth 37mm bore, it's an exact copy of the 40mm M203.

https://www.brownells.com/shooting-a...rod118458.aspx